NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2010-06-17 806-471 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AMARILLO TX
2010-06-17 830-383 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 FREDECKSBG TX
2010-06-17 864-478 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J GREENVILLE SC
2010-06-17 940-273 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 DECATUR TX
2010-06-16 210-526 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2010-06-16 218-489 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCC TELEPHONY LLC 593K BUHL MN
2010-06-16 219-286 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F VALPARAISO IN
2010-06-16 219-585 0–9 XXXall 10 · 3 holders which blocks → MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F WESTVILLE IN
2010-06-16 289-981 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Oakville —
2010-06-16 289-983 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Burlington —
2010-06-16 320-399 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F IRVING MN
2010-06-16 320-404 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F SUNBURG MN
2010-06-16 450-704 not yet reported which blocks → Videotron Ltd. 8306 Le Gardeur —
2010-06-16 450-705 not yet reported which blocks → Videotron Ltd. 8306 L'Epiphanie-l'Assomption —
2010-06-16 504-327 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2010-06-16 507-397 1XXX which blocks → MCC TELEPHONY OF MINNESOTA, LLC - MN 719F BROWNSVL MN
2010-06-16 581-997 not yet reported which blocks → TELUS Mobility 8303 Quebec —
2010-06-16 613-890 not yet reported which blocks → Fido Solutions Inc. 5643 Ottawa-Hull —
2010-06-16 647-975 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2010-06-16 647-978 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2010-06-16 647-979 not yet reported which blocks → Fido Solutions Inc. 5643 Toronto —
2010-06-16 647-980 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-06-16 773-245 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN08 IL
2010-06-16 830-353 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 KERRVILLE TX
2010-06-15 201-565 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F JERSEYCITY NJ
2010-06-15 210-505 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2010-06-15 210-609 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2010-06-15 336-422 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
2010-06-15 443-814 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2010-06-15 540-602 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 STAFFORD VA
2010-06-15 609-789 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J TRENTON NJ
2010-06-15 757-933 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NWPTNWSZN1 VA
2010-06-15 772-249 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J PTST LUCIE FL
2010-06-15 801-200 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2010-06-15 850-737 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 FTWALTNBCH FL
2010-06-15 951-297 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2010-06-14 234-221 0–9 XXXall 10 · 9 holders which blocks → SUPER-NET, INC. - OH 155F NAVARRE OH
2010-06-14 318-553 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SHREVEPORT LA
2010-06-14 318-562 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 6 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 SHREVEPORT LA
2010-06-14 404-821 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2010-06-14 404-938 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2010-06-14 424-256 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E W ANGELES CA
2010-06-14 505-433 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA NM-LLC 450C ALBUQURQUE NM
2010-06-14 518-310 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K PLATTSBG NY
2010-06-14 606-518 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J FEDSCREEK KY
2010-06-14 717-462 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 CARLISLE PA
2010-06-14 724-487 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 BUTLER PA
2010-06-14 816-900 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → MCC TELEPHONY OF MISSOURI, LLC - MO 938F EXCELSRSPG MO
2010-06-14 864-437 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 ANDERSON SC
2010-06-14 919-500 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 RALEIGH NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.